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在高频雷达的工作频段中,电磁环境极其恶劣,一般很难找到一段连续无扰的工作频段,因此需要根据外部频率监测的结果来选取雷达工作的频率点,以提高雷达的有效带宽;但是由于频谱的不连续,传统的处理方式不再适用。作者提出一种新的处理方法,先对回波进行速度谱处理,补偿相应的相位,然后对距离维进行先匹配后用加权迭代的最小二乘滤波器进行滤波。仿真结果表明,该算法不仅能得到目标的二维分辨,而且能极大地抑制距离旁瓣。
In the working frequency band of high-frequency radar, the electromagnetic environment is extremely harsh and it is generally difficult to find a continuous and interference-free working frequency band. Therefore, the frequency of the radar operation needs to be selected according to the result of the external frequency monitoring so as to increase the effective bandwidth of the radar; Due to the discontinuity of the spectrum, the traditional approach no longer applies. The authors proposed a new approach to deal with the echo velocity spectrum processing, the corresponding phase compensation, and then the first dimension of the distance after the match with a weighted iterative least squares filter. The simulation results show that this algorithm can not only get the two-dimensional resolution of the target, but also greatly suppress the side-lobe distance.